CVE-2026-64587

net: ethernet: arc: emac: quiesce interrupts before requesting IRQ

State: Published
Severity: 7.0 High
Published: Aug 6, 2026
Updated: Aug 8, 2026
Reserved: Jul 19, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

net: ethernet: arc: emac: quiesce interrupts before requesting IRQ

Normal RX/TX interrupts are enabled later, in arc_emac_open(), so probe should not see interrupt delivery in the usual case. However, hardware may still present stale or latched interrupt status left by firmware or the bootloader.

If probe later unwinds after devm_request_irq() has installed the handler, such a stale interrupt can still reach arc_emac_intr() during teardown and race with release of the associated net_device.

Avoid that window by putting the device into a known quiescent state before requesting the IRQ: disable all EMAC interrupt sources and clear any pending EMAC interrupt status bits. This keeps the change hardware-focused and minimal, while preventing spurious IRQ delivery from leftover state.

Scores

CVSS	Score	Vector	Source
3.1	7.0 High	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before abd338da658d7faa8e26cfefc8f83f0066707564Affected e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 5f29dd540fe5ea3c826fc8ec759ba488b31f9707Affected e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 6fc7449773748c7b904235a09a67054d78ab1172Affected e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 81431da777924dddaefa5c9b0ca9da4a93f9df96Affected e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before d0f2386f529807826e7404d40a245ee428f89f62Affected e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 8efd5dcd31e22a9308b16b107a052fcd568c0a99Affected e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 8f9adb3605e36f75639de529bb3d66e94194a388Affected e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 2503d08f8a2de618e5c3a8183b250ff4a2e2d52cAffected
LinuxLinux	3.11Affected before 3.11Not affected 5.10.253 through 5.10.Not affected 5.15.203 through 5.15.Not affected 6.1.167 through 6.1.Not affected 6.6.130 through 6.6.Not affected 6.12.78 through 6.12.Not affected 6.18.19 through 6.18.Not affected 6.19.9 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before abd338da658d7faa8e26cfefc8f83f0066707564Affected
e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 5f29dd540fe5ea3c826fc8ec759ba488b31f9707Affected
e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 6fc7449773748c7b904235a09a67054d78ab1172Affected
e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 81431da777924dddaefa5c9b0ca9da4a93f9df96Affected
e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before d0f2386f529807826e7404d40a245ee428f89f62Affected
e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 8efd5dcd31e22a9308b16b107a052fcd568c0a99Affected
e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 8f9adb3605e36f75639de529bb3d66e94194a388Affected
e4f2379db6c6823c5d4a4c2c912df00c65de51d7 to before 2503d08f8a2de618e5c3a8183b250ff4a2e2d52cAffected

LinuxLinux

3.11Affected
before 3.11Not affected
5.10.253 through 5.10.*Not affected
5.15.203 through 5.15.*Not affected
6.1.167 through 6.1.*Not affected
6.6.130 through 6.6.*Not affected
6.12.78 through 6.12.*Not affected
6.18.19 through 6.18.*Not affected
6.19.9 through 6.19.*Not affected
7.0 and laterNot affected

References

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